Click here for production status of specific part numbers. MAX2078 Octal-Channel Ultrasound Front-End with CW Doppler Mixers General Description Benefits and Features The MAX2078 octal-channel ultrasound front-end is a fully 8 Full Channels of LNA, VGA, AAF, and CWD Mixers integrated bipolar, high-density octal-channel ultrasound in a Small, 10mm x 10mm TQFN Package receiver optimized for low cost, high-channel count, high- Pin Compatible with MAX2077 with LNA, VGA, and performance portable and cart-based ultrasound systems. AAF in 10mm x 10mm TQFN Variant The easy-to-use IC allows the user to achieve high-end Ultra-Low Full-Channel Noise Figure of 2.4dB at 2D, PW, and CW Doppler (CWD) imaging capability using R = R = 200 IN S substantially less space and power. The highly compact Low Output-Referred Noise of 23nV/Hz at 5MHz, imaging receiver lineup, including low-noise amplifier 20dB Gain, Yielding a Broadband SNR of 68dB** for (LNA), variable-gain amplifier (VGA), and anti-alias filter Excellent Second-Harmonic Imaging (AAF), achieves an ultra-low 2.4dB noise figure at R S High Near-Carrier SNR of 140dBc/Hz at 1kHz Offset = R = 200 at a very low 64.8mW per channel power IN from a 5MHz, 1V Output Signal, and 20dB of P-P dissipation. The full imaging receiver channel has been Gain for Excellent Low-Velocity PW and Color-Flow optimized for second-harmonic imaging with -64dBFS Doppler Sensitivity in a High-Clutter Environment second-harmonic distortion performance with a 1V P-P 5MHz output signal. The bipolar front-end has also been Ultra-Low-Power 64.8mW per Full-Channel (LNA, VGA, and AAF) Normal Imaging Mode (234mW per optimized for excellent low-velocity PW and color-flow Doppler sensitivity with an exceptional near-carrier SNR Channel in CWD Mode) of 140dBc/Hz at 1kHz offset from a 5MHz 1V output Selectable Active Input-Impedance Matching of 50, P-P clutter signal. 100, 200, and 1k A fully integrated high-performance, programmable CWD Wide Input-Voltage Range of 330mV in High LNA P-P beamformer is also included. Separate I/Q mixers for Gain Mode and 550mV in Low LNA Gain Mode P-P each channel are available for optimal CWD sensitivity Integrated Selectable 3-Pole 9MHz, 10MHz, 15MHz, in high-clutter environments, yielding an impressive near- and 18MHz Butterworth AAF carrier SNR of 154dBc/Hz at 1kHz offset from a 1.25MHz Fast-Recovery, Low-Power Modes (< 2s) 200mV input clutter signal. P-P Fully Integrated, High Dynamic Range CWD The MAX2078 octal-channel ultrasound front-end is avail- Beamformer with Near-Carrier SNR of 154dBc/Hz at able in a small 10mm x 10mm, 68-pin thin QFN package 1kHz Offset from a 1.25MHz, 200mV Input Clutter P-P with an exposed pad and is specified over a 0C to +70C Signal temperature range. **When coupled with the MAX1437B ADC. Applications Medical Ultrasound Imaging Sonar Ordering Information appears at end of data sheet. 19-4570 Rev 4 6/19MAX2078 Octal-Channel Ultrasound Front-End with CW Doppler Mixers Typical Application Circuit 11V V CC2 R4 162 V CC2 R3 C36 C34 162 100nF OUT1+ 100nF IN1 V CC1 R2 C37 C35 162 22nF 100nF C33 R1 4.7nF C39 C38 162 10nF 10nF C1 22nF 68 67 66 65 64 63 62 61 60 59 58 57 56 55 54 53 52 C32 4.7nF IN2 OUT1- OUT1- 1 51 + C31 4.7nF INC2 OUT2+ OUT2+ IN2 2 50 C30 C2 4.7nF 10nF ZF3 OUT2- 3 49 OUT2- C3 C29 22nF 4.7nF IN3 OUT3+ OUT3+ IN3 4 48 C28 4.7nF INC3 OUT3- 5 47 OUT3- C4 C27 10nF 4.7nF ZF4 OUT4+ OUT4+ 6 46 C26 C5 22nF 4.7nF IN4 OUT4- IN4 45 OUT4- 7 C25 100nF INC4 V V CC1 CC1 8 44 GND LO+ MAX2078 9 43 LO+ C6 1F LO- AG 10 42 LO- C24 C7 4.7nF 10nF ZF5 OUT5+ 11 41 OUT5+ C8 C23 22nF 4.7nF IN5 OUT5- OUT5- IN5 12 40 C22 4.7nF INC5 OUT6+ 13 OUT6+ 39 C9 C21 4.7nF 10nF ZF6 OUT6- 14 38 OUT6- C10 C20 22nF 4.7nF OUT7+ IN6 OUT7+ IN6 15 37 C19 4.7nF INC6 OUT7- 16 36 OUT7- C18 C11 *EP 4.7nF 10nF OUT8+ ZF7 17 35 OUT8+ 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 C12 22nF IN7 C13 10nF C40 4.7nF C14 REF VG+ VG- DOUT 22nF C16 C17 IN8 C15 100nF 100nF 100nF OUT8- *EP = EXPOSED PAD. Maxim Integrated 2 www.maximintegrated.com IN7 ZF2 INC7 INC1 ZF8 IN1 IN8 ZF1 INC8 VCC2 VCC2 V CC1 V REF CI+ V CC1 CI- VG+ CQ+ VG- CQ- GND V/C V/C NP CLP NP PD CS CSB GND DIN DIN DOUT CLK CLK V V CC2 CC2 OUT8- OUT1+